Re: [CAD_CAM_EDM_DRO] Re: repeatable vs accurate switch

At 01:37 PM 11/6/03 +0000, you wrote:

>I've been considering this myself, and have been thinking of dual
>sensors on each axis, one on the table itself for coarse position,
>and another on the back of the motor for fine position.
>
>In a stepper driven environment, this should give repeatability
>limited only by the backlash in the table.

That was the method used by most machine tools with resolvers, including my
old Hardinge CHNC. The once per rev. sensor was a hall effect device.

-Bob